Patents by Inventor Douglas Laing

Douglas Laing has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Tracked vehicle operable by a non-tracked vehicle
    Patent number: 6659214
    Abstract: A tracked vehicle adapted for receiving a wheeled vehicle and to be driven by the wheeled vehicle. The tracked vehicle has a chassis. Guide and drive wheels are mounted on the chassis at each side and a set of tracks are driven by the driven wheels and guided by the guide wheels. Rear wheels of the wheeled vehicle rest in a pair of drive rollers and rotating stiles are adapted for receiving steered wheels of the wheeled vehicle.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: December 9, 2003
    Assignee: R. Pollitt Oilfield Construction, Ltd.
    Inventor: Douglas Laing